Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Profit of consolidated companies	$ 105	$ 112	$ 229	$ 198
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax (expense)/benefit	(167)	79	(61)	251
Derivative financial instruments:
Gains (losses) deferred, net of tax (expense)/benefit	(1)	(1)	(1)	(1)
(Gains) losses reclassified to earnings, net of tax (expense)/benefit	0	4	1	9
Total Other comprehensive income (loss), net of tax	(168)	82	(61)	259
Comprehensive income (loss)	(63)	194	168	457
Less: Comprehensive income attributable to the noncontrolling interests	2	6	5	10
Comprehensive income (loss) attributable to Caterpillar Financial Services Corporation	$ (65)	$ 188	$ 163	$ 447